code: def sql_demo():
      """
      Print out every row from the 'city.db' database.
      """
      print()
      print("Using SQL to extract rows from 'city.db' RDB.")
      for row in sql_query(
          "corpora/city_database/city.db", "SELECT * FROM city_table"
      ):
          print(row)
  
imports: import os
  import re
  import shelve
  import sys
  import nltk.data
label_desc: Use image node_id 15 for calling a global function with example usage: sql_demo() without return types